"We have the Brimstone precision missile system which enables us to strike accurately with minimum collateral damage. Something that even the Americans do not have," Cameron told the House of Commons.
The United Kingdom is a member of an international coalition of more than 60 countries working together to destroy ISIL in Syria and Iraq. London has been carrying out airstrikes against ISIL targets in Iraq since September 2014, but had not as yet extended its campaign to Syria.
Brimstone is an air-to-ground attack missile in service of Britain's Royal Air Force since 2005.
At the same time, Cameron ruled out calls for Britain to enlist Syrian President Bashar Assad as an ally in the fight against the Islamic State jihadist group, explaining in a statement published Thursday that such move would aggravate the situation in the Middle Eastern country.
"Some have argued that we should ally ourselves with Assad and his regime against the greater threat posed by ISIL, as the ‘lesser of two evils'. But this misunderstands the causes of the problem; and would make matters worse," he said in a written response to the Parliament's Foreign Affairs Select Committee report on the extension of British military operations to Syria.
Assad's "brutal attacks against his own people" act as a recruitment factor for the ISIL, Cameron said in the statement. The international community can only work with a transitional government against the ISIL, he added.
On Thursday, David Cameron addressed the British House of Commons on Thursday, lobbying members of parliament to vote in support of airstrikes against ISIL targets in Syria.
London has been carrying out airstrikes against ISIL targets in Iraq since September 2014, but had not as yet extended its campaign to Syria, as Cameron lost a parliamentary vote in 2013.
